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booster injection

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booster injection,
the administration of an additional dose of antigen within a defined period of time, such as a vaccine or toxoid, usually in a smaller amount than the original immunization. It is given to maintain the immune response at an appropriate level.


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Follow your vet's advice on booster injections, which are usually once a year, because an animal's immunity to the infection decreases over time.
His immune system is fine now but he needs intravenous medicine until he gets his booster injections again.
We've had to have our booster injections this week - it was rubbish.
 
 
 
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